Another way is to peruse manufacturer's web site and if you see one you like, find a dealer in your area or online. Be aware that a lot of lighting houses will not have much in stock and you may have to order from just a picture in a catalog or online. Here are some manufacturer's to check out:

Also, if you find something you like and it appears that it may be for a track light system, some manufacturer's have a mounting system to adapt any pendant to a single ceiling box, such as Tech Lighting's Free Jack system.

Another vote for Besa here. I was in love with a pendant from LBL, until I found out the cost. Besa had a pendant that I now think is so much better suited to my style and taste, for half the price. But LBL has beautiful lights and a large selection, so you should check it out, as well.